Path: csiph.com!fu-berlin.de!uni-berlin.de!not-for-mail
From: Chris Angelico <rosuav@gmail.com>
Newsgroups: comp.lang.python
Subject: Re: There has to be a better way to split this string!
Date: Wed, 10 Feb 2016 12:34:54 +1100
Lines: 30
Message-ID: <mailman.8.1455068097.7749.python-list@python.org>
References: <56BA91B5.5090400@cajuntechie.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8
In-Reply-To: <56BA91B5.5090400@cajuntechie.org>
Precedence: list
Xref: csiph.com comp.lang.python:102744

On Wed, Feb 10, 2016 at 12:26 PM, Anthony Papillion
<anthony@cajuntechie.org> wrote:
> I am using datetime.now() to create a unique version of a filename.

First off, be aware that this won't make a unique file name. But if
you're okay with that (deal with collisions somehow), then sure.

> When the final file is named, it will look something like:
>
> myfile-2015-02-09-19-08-45-4223
>
> Notice I'm replacing all of the "."'s, " "'s, and ":"'s returned by
> datetime.now() with "-"'s. I'm doing that using the following code but
> it's freaking ugly and I KNOW there is a better way to do it. I just
> can't seem to think of it right now. Can anyone help? What is the
> "right", or at least, less ugly, way to do this task?

Instead of using str(), use strftime():

>>> now = datetime.datetime.now()
>>> str(now)
'2016-02-10 12:34:26.377701'
>>> now.strftime("%Y-%m-%d-%H-%M-%S-%f")
'2016-02-10-12-34-26-377701'

You could instead use some other format string if you like. Here's your options:

https://docs.python.org/3/library/datetime.html#strftime-strptime-behavior

ChrisA